Temp gauge sender location

Thermostat spacer with EFI sensor port | AR Engineering
AR438c-Medium.jpg

Oil sender goes into stock location, unless you want to retain the idiot light; in which case you just "T" it in to the stock location in tandem with the factory sender. As far as the line goes, I personally would use copper, I have had issues with plastic, If your worried about it, run braided.